Sierra part number 18-7278
check and see if this one will work, its listed as crossing over to a Mercruiser 3.0 4 cyl but may work on the OMC as the engines were the same GM 4 cyl.
18-7278 - FUEL PUMP
Replaces: Mercrusier #86234A4, 86234A05 OMC 985602, 985603, 982240 (Flange I.D. # M60032)
For: GM (4 & 6 Cyl.) 153, 181, 225, 250, 120 / 140 / 160 / 165 / 470 / 485 / 488
Uses filter 18-7860 & gasket 18-0889
Sierra Marine Fuel Pump is equivalent to parts:
- 985603 Evinrude Johnson OMC BRP
- 985602 Evinrude Johnson OMC BRP
- 982240 Evinrude Johnson OMC BRP
- 509395 Evinrude Johnson OMC BRP
- 86234A05 Mercury Marine
- 86234A 4 Mercury Marine
- 9-35419 Mallory Marine
Additional information about this part can be found on page(s) 139, 486, 621, 622, 624, 627, 764 of the Sierra Marine catalog.